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Ultrathin g-C3N4 nanosheets and fluorescent g-C3N4 quantum dots are simultaneously prepared via one-pot ethanol-thermal treatment in the presence of KOH.

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Although autograft is a routine procedure in anterior interbody fusion of the cervical spine, donor site morbidity is a significant problem. Many bone grafting materials developed such as allograft bone, demineralized bone matrix (DBM), and synthetic implants were used to repair bony defects; however, each has its specific disadvantage. Therefore, alternative materials for autogenous bone in grafting are needed. Ninety-one patients with symptomatic cervical disc diseases were randomly allocated for either autologous iliac crest bone graft (AIG) or mineralized collagen (MC). Clinical and radiological comparisons were performed for the two groups. Patients were followed-up routinely in the outpatient clinic, where clinical and radiological evaluations were taken. The mean operation time to perform AIG and MC was 194 ± 37 and 121 ± 26 minutes, respectively. The mean volume of blood loss during the operation was 140 ± 41 and 79 ± 25 mL for AIG and MC, respectively. The mean length of hospitalization due to AIG and MC was 9 7 ± 0 7 and 5 9 ± 0 8 days, respectively. The clinical outcomes were identical, and fusion rates were similar between the two groups. This study shows effective results of MC in anterior cervical intersomatic fusion. MC may be a promising substitute for autologous iliac crest bone graft.

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Both nanostructures and conformations of different protein/polysaccharide additives have critical influence on the performance of calcium sulfate (CS) bone cements. Silk fibroin (SF) as matrix and additives has been introduced to develop bone scaffolds and cements. Here, β‐sheet‐rich SF nanofibers (SFF) was used to tune the solidification of CS, achieving better mechanical and biological properties. The ratio of SFF was adjusted to further optimize CS functions. Compared to that regulated with natural silk fibers (NSF) and SF solutions (SFS), the SFF‐induced CS showed smaller size and more filament structures. Better mechanical properties were achieved, suggesting the superiority of the SFF as the solidifying solution to combine with α‐calcium sulfate hemihydrate (α‐CSH) at the same liquid/solid (L/S) ratio. Scanning electron microscope, X‐ray diffraction, Fourier transform infrared spectroscopy, setting time, porosity, mechanical performance test, degradation performance test, and water resistance test were used to demonstrate the properties of this bone repair cement. Cell culture experiments in vitro was used to evaluate the biocompatibility of this composited material. In conclusion, the results demonstrated that nanofibers was a better form of SF in the modification of CSH cement. And the research conducted in this article on improving the mechanical and biological properties of CSH would supported the reference for later clinical experiments. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B:2611–2619, 2019.

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